The impact on their lives can be profound as even shaking hands with someone who has been touching nuts can trigger a reaction.

这种病症对患者的生活影响很大，即使与接触过坚果的人握握手也可引起过敏反应。

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Outdoor advertising usually does not trigger a reaction in teenagers, but sometimes they will oppose it (the Benetton baby adverts).

户外广告通常不能引起青少年的注意，但有时他们会反对它(如Benetton的婴儿广告)。

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Nuts can trigger off a violent allergic reaction.

坚果可以引起严重的过敏反应。

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"Carousel, " "Oliver, " "Fiddler on the Roof, " "Cabaret, " "Les Miserables, " and "Dreamgirls, " have all played there, though only "Dreamgirls" seemed to trigger a reaction.

WSJ: Broadway Grows Up

The new study suggested that the antibody produced by the malfunctioning immune system might trigger a reaction which led to the destruction of these cells.

BBC: NEWS | Health | Immune system link to narcolepsy

I've now been told I have no allergy but chronic ordinary urticaria which basically means my immune system is rubbish and anything could trigger a reaction of various degrees at anytime.

BBC: Children with allergies 'being let down': Your comments